xxxHOLiC, Mahoutsukai no Yome Recommendations

Both Chise and Watanuki are plagued by their ability to see spirits/monsters. They both encounter a wise and powerful sorcerer, Elias and Yuuko who teach them magic and how to deal with otherworldly creatures. Chise and Watanuki are exceedingly kind people but lack a sense of self-worth and will give to the point of harming themselves - something they must learn to overcome if they want to understand what it means to love those important to them.